package socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * 聊天室的服务器端
 */
public class Server {
    private ServerSocket serverSocket;
    public Server() throws IOException {
        try {
            System.out.println("正在启动服务端");
            serverSocket = new ServerSocket(8088);
            System.out.println("服务器端启动完毕!");
        }catch (IOException e){
            e.printStackTrace();
        }
    }

    public void start() throws IOException {
        /*
            ServerSocket提供的重要方法:
            Socket accept()
            用于接收客户端的连接，并返回一个Socket实例与连接的客户端交互
            该方法是一个阻塞方法，调用后程序会"卡住"，知道一个客户端连接为止
         */
        try {
            while (true){
                System.out.println("等待客户端连接");
                Socket socket = serverSocket.accept();
                System.out.println("一个客户端连接上了");

                InputStream in = socket.getInputStream();
                InputStreamReader isr = new InputStreamReader(in, StandardCharsets.UTF_8);
                BufferedReader br = new BufferedReader(isr);
                //读取一行来自远程计算机(客户端)发送过来的字符串
                String message;
                while ((message=br.readLine())!=null){
                    System.out.println("客户端说:"+message);
                }
            }

            /*

             */
        }catch (IOException e){
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {
        Server server = new Server();
        server.start();
    }
}
